The exposure to fumes by a child will likely be minimal but, as
the purpose will be 'educational', there may be a duty to employ
best practice so they end up knowing what a safe workstation is
like.

Charles

Hmm. Depressingly good point. I just hold my breath while soldering
and wash up when I'm done but I really ought to get a hood --
particularly since I'm training my kid to all my bad habits.
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With the room being ventilated, a small axial fan positioned close to the
soldering area will adequately disperse the fumes .

Frank GM0CSZ / KN6WH